Fourteen Weeks in Descriptive Astronomy |
From inside the book
Results 1-5 of 18
Page 17
... Period , " which is the length of time in which the eclipses of the sun and moon repeat themselves in the same order . THE GRECIANS . - In the seventh century B. C. , Thales , noted for his electrical discoveries , acquired much renown ...
... Period , " which is the length of time in which the eclipses of the sun and moon repeat themselves in the same order . THE GRECIANS . - In the seventh century B. C. , Thales , noted for his electrical discoveries , acquired much renown ...
Page 29
... period is to the square of Mars ' period , as the cube of Jupiter's distance is to the cube of Mars ' distance ; or , representing the earth's time of revolu- tion by P , and her distance from the sun by p , then letting D and d ...
... period is to the square of Mars ' period , as the cube of Jupiter's distance is to the cube of Mars ' distance ; or , representing the earth's time of revolu- tion by P , and her distance from the sun by p , then letting D and d ...
Page 52
... period of ten years , observations were made on 1982 days , on 372 of which there were no spots seen . As many as two hundred spots have been noticed at one time . They are found in two belts , one on each side of the equator , within ...
... period of ten years , observations were made on 1982 days , on 372 of which there were no spots seen . As many as two hundred spots have been noticed at one time . They are found in two belts , one on each side of the equator , within ...
Page 58
... period of about 56 years . Independently of this conclusion , it has also been discovered that the aurora has a similar period of 56 years . The spots are influenced by the planets . - They ap- pear to be especially sensitive to the ...
... period of about 56 years . Independently of this conclusion , it has also been discovered that the aurora has a similar period of 56 years . The spots are influenced by the planets . - They ap- pear to be especially sensitive to the ...
Page 81
... period always exceeds the sidereal . 2. The interval between two successive conjunc- tions or oppositions of a superior planet is termed a synodic revolution . Since the earth moves so much faster than any superior planet , it follows ...
... period always exceeds the sidereal . 2. The interval between two successive conjunc- tions or oppositions of a superior planet is termed a synodic revolution . Since the earth moves so much faster than any superior planet , it follows ...
Other editions - View all
Common terms and phrases
ancients Andromeda angle aphelion appear Aries astronomers atmosphere axis Boötes bright brilliant Canis Minor Capricornus Cassiopeia cause Celestial Sphere centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior conjunction inferior planet Jupiter latitude length light luminous lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon's motion move naked eye nearly nebula Neptune night node north pole Orion parallax pass path penumbra perihelion Perseus Pisces polar Polaris precession rays revolve ring rising Saturn seasons seen shine side sidereal sidereal day solar day solar system solstice space spots summer sun's surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible winter Zodiac